Tag:hydrogen sulfide

№5|2019

SEWERAGE NETWORKS

bbk 000000

UDC 628.237

Fedorov Sviatoslav Viktorovich, Vasilyev V. M., Klementyev M. N.

Study of gas evolution in a sewer section

Summary

Transportation of wastewater through sewer networks is accompanied by the generation and evolution of gases from the flow. For a quantitative assessment of the gas evolution process a sewer section model has been developed in the ANSYS CFX finite element analysis package. The model takes into account the combined flow of wastewater, entrained air and sewage gas (e.g. carbon dioxide) coming from the collector tray. Monitoring was carried out in a section of the domestic sewage system (DN = 500 mm) in the industrial zone of Obukhovo in St. Petersburg. The measured values of the vacuum pressure are in the range of model calculations. The process of designing a computational area of the sewer section and establishing initial and boundary conditions is presented. As a result of modeling the dependences of the carbon dioxide concentration and the pressure of the gas-air environment in the underroof space of the pipeline with different slopes and filling levels were obtained. The results obtained can serve as a basis for the approach to predicting the process of gas evolution in sewer sections.

Key words

, , , , , , , ,

Скачать/download (PDF) free access

 

№6|2013

WASTEWATER TREATMENT

bbk 000000

UDC 628.34

Fedorovskaya T. G., Koudryashova G. N.

On high alkaline sulfide-containing wastewater treatment

Summary

One of the main problems experienced during tannery wastewater transportation and treatment is hydrogen sulfide release that causes pipeline corrosion, gas contamination of premises and wastewater treatment facilities territory. The methods of sulfide-containing wastewater treatment have been well investigated; however, the reason of hydrogen sulfide release is still urgent and needs explanation. Theoretic and experimental studies carried out at the Moscow State University of Civil Engineering allowed explaining the reasons of hydrogen sulfide release from high alkaline solutions. Experimental studies with standardized test solutions of sodium sulfide showed that their alkalization inhibited hydrogen sulfide release, however required large amounts of alkaline agent and could be hardly adopted for practical use.

Key words

, , , , ,

 

№10|2012

WASTEWATER TREATMENT

bbk 000000

UDC 504.3.054:628.316.7

Bogomolov M. V., Gavrilin A. M., Agevnin A. R., Kireyev Ju. P., Maleyeva A. V.

Field trials of wastewater air-gaseous emissions odor control technologies

Summary

The advanced technologies of removing nuisance odors from wastewater gaseous emissions are considered. The results of field trials of adsorption filters for the sewer vents and biological odor control systems for the manholes at Mosvodokanal MPUE facilities are described. For some years Mosvodokanal is developing optimal wastewater odor control methods. International experience is studied; investigations, experiments and pilot tests are carried out.

Key words

, , ,

 

№7|2018

WATER TREATMENT

bbk 000000

УДК 628.16.094.3:66.074.371

FESENKO L. N., Tcherkesov A. Yu., Ignatenko S. I., Shchukin S. A.

Purification of hydrogen sulfide containing natural water
by iron-catalytic oxidation in a reactor with unltrafiltration separation

Summary

Currently purification of hydrogen sulfide containing water has been still a bottleneck in water treatment and demands advanced high-efficient technologies, equipment and plants providing for solving at the same time drinking and environmental aspects. The technology based on iron-catalytic oxidation of sulfides in the presence of atmospheric oxygen and combined with membrane treatment is proposed as an advanced technology of hydrogen sulfide removal from natural water. The data on practical testing the proposed technology in a laboratory unit is presented. Subsequent to the results of the experimental studies the area of the developed technolo­gy application in purification of hydrogen sulfide containing natural water is substantiated. The absence of accompanying hydrogen sulfide emission from the reactor in the process of water purification and environmental safety has been noted. Based on the obtained results the technology is considered for today as possible and essential. Herewith further study with investigations directed at determi­ning the optimal process parameters is needed.

Key words

, , , ,

 

№11|2012

CORROSION PROTECTION

bbk 000000

UDC 628.21:661.9

Kofman V. Ya.

Hydrogen sulfide and methane in the sewer networks (review)

Summary

International experience of using methods of protecting from hydrogen sulfide and methane generation in sewer networks is presented. The efficiency of using reagent methods and their cost depend to a great extent on the parameters of sewer pipelines and wastewater composition. Therefore in order to make a reliable choice of one or another method one should take into consideration the local conditions and carry out relevant tests.

Key words

, , , ,

 

vstmag engfree 200x100 2

mvkniipr ru